Lysosomes And Lysosomal Dysfunction In Ageing Biology
Our cells contain tiny compartments called lysosomes, often referred to as the cell’s recycling centers. These essential structures are responsible for breaking down and recycling waste materials, damaged cell parts, and even invading pathogens, playing a crucial role in maintaining overall cellular health, a process known as homeostasis.
As we age, these vital recycling centers can start to falter. This decline in function, known as lysosomal dysfunction, manifests in several ways: the cell’s ability to create new lysosomes (biogenesis) can be impaired, their internal environment may become less acidic, and their enzymes, which are responsible for breaking down molecules, may become less active. Additionally, the protective membrane surrounding lysosomes can become compromised.
When lysosomes don’t work properly, waste materials and damaged components, such as proteins and lipids (macromolecules), can build up inside cells. This accumulation leads to cellular stress, a state where cells struggle to function correctly. It also contributes to “inflammageing,” a chronic low-grade inflammation associated with aging, and cellular senescence, where cells stop dividing and can release harmful substances. These issues are increasingly linked to a range of age-related health problems, including brain disorders like Alzheimer’s, heart and metabolic conditions, and a weakened immune system, making us more susceptible to infections.
Understanding how lysosomes change with age and how these changes drive age-related diseases is crucial. By exploring these mechanisms, scientists hope to develop new strategies to target lysosomal function, potentially leading to therapies that promote healthier aging and alleviate age-associated pathologies.
Source: link to paper